EP0321785A3 - Probe for detecting gases by exothermal catalytic reactions - Google Patents

Probe for detecting gases by exothermal catalytic reactions Download PDF

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Publication number
EP0321785A3
EP0321785A3 EP19880120461 EP88120461A EP0321785A3 EP 0321785 A3 EP0321785 A3 EP 0321785A3 EP 19880120461 EP19880120461 EP 19880120461 EP 88120461 A EP88120461 A EP 88120461A EP 0321785 A3 EP0321785 A3 EP 0321785A3
Authority
EP
European Patent Office
Prior art keywords
transistor
probe
catalytic reactions
detecting gases
catalyst layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19880120461
Other languages
German (de)
French (fr)
Other versions
EP0321785A2 (en
Inventor
Franz Dipl.-Ing. Nuscheler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0321785A2 publication Critical patent/EP0321785A2/en
Publication of EP0321785A3 publication Critical patent/EP0321785A3/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
    • G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
    • G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
    • G01N25/30—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

Die Sensoranordnung enthält einen mit einer Katalysator­ schicht (9) versehenen Transistor (20). Der Nachweis der Gase erfolgt über die Temperaturerhöhung des Transistors (20) infolge einer exotermen, katalytischen Reaktion an der Katalysatoroberfläche, wobei die Katalysatorschicht (9) eine vorbestimmte Betriebstemperatur haben muß. Die Katalysator­ schicht (9) wird durch die Verlustleistung des Transistors (20), der als Sensor wirkt, oder durch die Verlustleistung eines Heiztransistors (11) geheizt. The sensor arrangement contains one with a catalyst layer (9) provided transistor (20). Evidence of Gases occur through the temperature increase of the transistor (20) due to an exotermic catalytic reaction on the Catalyst surface, the catalyst layer (9) must have a predetermined operating temperature. The catalyst layer (9) is due to the power loss of the transistor (20), which acts as a sensor, or through the power loss a heating transistor (11) heated.

EP19880120461 1987-12-21 1988-12-07 Probe for detecting gases by exothermal catalytic reactions Withdrawn EP0321785A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3743400 1987-12-21
DE3743400 1987-12-21

Publications (2)

Publication Number Publication Date
EP0321785A2 EP0321785A2 (en) 1989-06-28
EP0321785A3 true EP0321785A3 (en) 1991-04-03

Family

ID=6343188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880120461 Withdrawn EP0321785A3 (en) 1987-12-21 1988-12-07 Probe for detecting gases by exothermal catalytic reactions

Country Status (2)

Country Link
EP (1) EP0321785A3 (en)
JP (1) JPH01203955A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4008150A1 (en) * 1990-03-14 1991-09-19 Fraunhofer Ges Forschung CATALYTIC GAS SENSOR
DE19645694C2 (en) * 1996-11-06 2002-10-24 Deutsch Zentr Luft & Raumfahrt Sensor for measuring the composition of hydrogen-oxygen gas mixtures
JP4296356B1 (en) * 2008-09-12 2009-07-15 国立大学法人 岡山大学 Gas sensor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2159781A5 (en) * 1971-11-12 1973-06-22 Dusserre Pierre
EP0117095A1 (en) * 1983-02-07 1984-08-29 THE GENERAL ELECTRIC COMPANY, p.l.c. Temperature sensors
DE3519397A1 (en) * 1985-05-30 1986-12-04 Siemens AG, 1000 Berlin und 8000 München Sensor for gas analysis and detection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2159781A5 (en) * 1971-11-12 1973-06-22 Dusserre Pierre
EP0117095A1 (en) * 1983-02-07 1984-08-29 THE GENERAL ELECTRIC COMPANY, p.l.c. Temperature sensors
DE3519397A1 (en) * 1985-05-30 1986-12-04 Siemens AG, 1000 Berlin und 8000 München Sensor for gas analysis and detection

Also Published As

Publication number Publication date
JPH01203955A (en) 1989-08-16
EP0321785A2 (en) 1989-06-28

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